1 research outputs found
Design and Implementation of Low Complexity Reconfigurable Filtered-OFDM based LDACS
L-band Digital Aeronautical Communication System (LDACS) aims to exploit
vacant spectrum in L-band via spectrum sharing, and orthogonal frequency
division multiplexing (OFDM) is the currently accepted LDACS waveform.
Recently, various works dealing with improving the spectrum utilization of
LDACS via filtering/windowing are being explored. In this direction, we propose
an improved and low complexity reconfigurable filtered OFDM (LRef-OFDM) based
LDACS using novel interpolation and masking based multi-stage digital filter.
The proposed filter is designed to meet the stringent non-uniform spectral
attenuation requirements of LDACS standard. It offers significantly lower
complexity as well as higher transmission bandwidth than state-of-the-art
approaches. We also integrate the proposed filter in our end-to-end LDACS
testbed realized using Zynq System on Chip and analyze the performance in the
presence of -band legacy user interference as well as LDACS specific
wireless channels. Via extensive experimental results, we demonstrate the
superiority of the proposed LRef-OFDM over OFDM and Filtered-OFDM based LDACS
in terms of power spectral density, bit error rate, implementation complexity,
and group delay parameters.Comment: Paper with Appendi